JP2020507477A - Machine and method for manufacturing reinforced net and reinforced net - Google Patents

Abstract

A machine for manufacturing a reinforcing net (1, 10) having a hexagonal mesh comprising a plurality of permanently deformable wires (2, 2 ', 3, 3') and at least one reinforcing element (5). The machine is a mechanism for spirally winding two first wires (2, 2 ') and two second wires (3, 3') one after the other, providing a passage for the reinforcing element (5). A first wire (2, 2) mounted on the machine and fed from a plurality of containers (90, 90 ') having a predetermined length of the first wire (2, 2') therein. 2 '), a part of a second wire (3) fed alternately with the first wire for knitting two by two in a spiral winding mechanism, and a transport system for a reinforcing element (5) fed into the machine. And for every reinforcing element (5) a wire for one of the second wires (3 ') Container (202) is provided, the wire container is rotatable about the reinforcing elements machine. The invention also relates to a multi-strand net of hexagonal mesh and a method for producing such a net. [Selection diagram] FIG.

Description

  The present invention relates to a machine and method for manufacturing a reinforced hexagonal net, and a reinforced hexagonal net.

  The present invention relates to, but is not limited to, a machine for manufacturing a hexagonal mesh net with at least one longitudinal (longitudinal) reinforcing element positioned to bisect the mesh that is woven and passed through the entire net. Developed for

  More than 40 years ago (IT1050936), it developed a machine for making hexagonal nets supplying at least one longitudinal reinforcing wire. The machine (FIG. 1) has proven to be very effective, but is used with a reinforcing wire 1 having the same thickness and strength as the wires 27, 34 used to manufacture the entire net. It is designed to be. However, stiffer, higher strength wires or stiffer and thicker cables cannot be used. In this machine, the wire 34 can be wrapped around another wire during weaving, as is common in the art, so that the net is woven with three wires into a braid. It is stored in the cylindrical container 33. A device is provided for the reinforcing wire and the wire 27, by means of which the wire 27 rotates around a reel 85 around which the reinforcing wire 1 is wound. To this end, the dimensions of the reel 85 are compact and the wire 27 is wound around it in a specially designed system. Obviously, a similar solution works perfectly for reinforcing wires 1 of similar stiffness as wires 27, 34, but because they cannot be wound around a reel with a small diameter, cables or high-strength Cannot be used with wires. However, windings of a suitable diameter for cables or high strength wires would not be compatible with this solution.

  Applicants have also been patented for two hexagonal mesh nets in which the wires have been replaced by cables. In these nets, each twist consists of only two elements: two wires, or wires and cables. As a result, it does not provide a device that allows the third wire / cable to be spirally wound together.

  It is an object of the present invention to solve these prior art problems, in particular the manufacture of hexagonal mesh nets having additional longitudinal reinforcing elements, said reinforcing elements being high strength wires or cables or ropes. Is to provide a machine. A further object is to create a part of the machine that is reliable, practical and safe to use.

  To achieve the above objects, the present invention relates to a machine and a net as claimed.

Further features and advantages will become apparent from the following detailed description of preferred embodiments of the invention, which refers to the accompanying drawings, which are provided for purposes of non-limiting examples only.
1 shows a portion of a prior art machine. 1 shows a part of the machine of the invention. 3 shows a net produced by the machine of FIG. 3 shows another net produced by the machine of FIG. FIG. 3 is a detailed view of the upper bar 30 of the machine of FIG. FIG. 3 is a detailed view of the upper bar 32 of the machine of FIG. Shows a pair of upper bars 30, 32 in a first position. Shows a pair of upper bars 30, 32 in a second position. Shows a pair of upper bars 30, 32 in a third position.

  2 to 9, the same elements are denoted by the same reference numerals, and are numbered independently of the prior art FIG.

  The portion of the net 1 in FIG. 3 is a double twisted net composed of a hexagonal mesh and a reinforced cable. The net is spirally wound around each other at the braids 7, 7 'to form a hexagonal mesh 4 and at least one reinforcing cable 5 inserted longitudinally through the selected braid 7'. And a plurality of wires 2, 3, 2 ', 3' wound around the wire. Between the two vertically continuous strands 7 ', the reinforcing cable forms two trapezoidal meshes arranged side by side. Hereinafter, the term "cable" will be used for brevity, but it will be understood that any reinforcing element having a strength greater than the strength of the wire that creates the net can be used. For example, a "cable" can be a metal cable composed of several single strands, a rope with a woven core, or a high-strength metal wire, where appropriate, galvanized or plastic-coated. Or you can.

  The wires and cables that make up the net are all arranged in the same direction, but in the following that direction is indicated as "longitudinal (longitudinal)". Each wire 2,3 is wound in an alternating spiral with a preceding wire 3,2 and a subsequent wire 3,2, known as a double twisted net, to form a twist 7.

  In addition, for every cable 5, the wire 2 ′ is alternately helically wound together with a single preceding wire 3 to form a twist 7, and the wire 2 ′ together with the reinforcing cable 5 It is spirally wound alternately with 3 'to form a twist 7' having three elements.

  Similarly, the wire 3 'is alternately spirally wound with the preceding wire 2' together with the reinforcing cable 5 to form a three-stranded strand 7 ', wherein the wire 3' is a single subsequent wire 2 '. Spirally wound together with the helical member to form a twist 7 having only two elements.

  The twisting continues in the same twisting direction in each of the twists 7, 7 ', i.e. clockwise or counterclockwise but in a constant direction at each twist. In FIG. 3, the twisted parts 7, 7 'have the wires 2, 3 spirally wound in alternating directions from one knitting step to the next, that is, the wires 2, 3 in one step. Once spirally wound together clockwise, the wires 2 and 3 are spirally wound counterclockwise in the lower and upper stages. However, it is not necessary to exclude different shapes, such as all braids 7, 7 'having the same weave direction.

  4, the net 10 further comprises at least one transverse cable 11. The cable 11 is arranged perpendicular to the cable 5 intersecting at the intersection 12 and is inserted into a twist 7 '' formed by two single longitudinal wires 2, 3, 2 ', 3'.

  The part of the net depicted in FIGS. 3 and 4 shows only one longitudinal cable 5 and only one transverse cable 11 so that details can be taken into account because the depicted part is small. It should be noted that Nevertheless, multiple vertical and horizontal cables are typically provided. Nets with these characteristics are extremely resistant to piercing and pulling with sharp objects, with reinforced cables that withstand most stresses directly. On the other hand, in the conventional double twisted net, the wires must withstand stress.

  In order to ensure adequate strength, the distance between the cables 5, 11 in both the horizontal direction (for both embodiments) and the vertical direction (for the embodiment of FIG. 4) should be less than 1 meter. Is preferred. For example, it should be noted that the penetration test rules provide for the use of square punches having a 1 meter surface, and therefore the presence of the cable at a distance of less than 1 meter allows at least one longitudinal cable and ( The transverse cable (if present) will definitely be within the punch.

  The function of the wires in the net in question is to hold the small material, in particular to hold all the cables directly braided in the braid in a fixed position, and the cable 5 , 11 is to hold tightly.

  The machine according to the invention for the manufacture of nets having the features described above is in part similar to the well-known machine for the assembly of conventional double twisted nets, developed many years ago by the same applicant. In the following description of the whole machine, the main focus is on new and original elements which make it possible to produce a net with a reinforced cable 5, and preferably a reinforced cable 11.

  As can be seen in FIG. 2, the machine 20 is, by means (not shown), provided with a drum mounted in a fixed framework of the machine so that it can rotate at a constant speed in the direction of arrow 24 about its axis T. With 22. A radial projection or peg 28 projects outwardly from the curved surface 26 of the drum. These pegs are arranged in rows extending in a direction parallel to the axis T and are arranged at equal angular intervals. The pegs 28 are arranged at regular intervals in each row, and the phases of two consecutive rows are axially shifted by half a pitch.

  These pegs form a hexagonal mesh net and serve to hold the already formed part of the net in the exit direction of the machine.

  Below the drum 22, there is provided a set of bars 30,32 and a set of bars 34,36 supporting a rotatable half cylinder 60,62,64,66, parallel to the axis T, The function of the body is to spirally wind the wires together in pairs to make a net.

  The bar has a U-shaped cross section. They are laid in pairs, with their U-shaped open ends facing each other, located on a vertical object plane bordering the outer edge of the drum 22, the bars 30, 32 forming the upper pair, 34, 36 form a lower pair. Inevitably, the upper and lower sides indicate the positions of the bars arranged in the embodiment in the figures. However, arranging them in different ways, for example running the wires horizontally, is by no means ruled out. More broadly, the "upper" bar has a downstream operating direction relative to the corresponding "lower" bar, regardless of the height at which it is placed.

  The bar is supported by elements 40, 42, 44, 46 which form part of the fixed framework of the machine. They can also move in a direction parallel to the direction of the axis T.

  5 and 6 depict the bars 30, 32 in more detail, which are exactly the same as the lower set of bars, bars 34, 36. Multiple fastenings at each end 50,52,54,56 of all sets of bars 30,32,34,36 facing respective ends 52,50,56,54 of all sets of bars (Pedestal) 48 is formed. The fastening portion 48 has an axis perpendicular to the axis T, is a semi-cylindrical shape located on the above-mentioned symmetry plane, and the distance between each pedestal and the adjacent pedestal in the same bar is Equal to the distance between Each pedestal 48 faces a similar pedestal 48 formed at the end of another bar of the same set.

  Rotatable semi-cylindrical bodies 62, 66 are embedded in pedestals 48 of bars 32, 36, respectively. The rotatable body 62 of the upper bar 32 is aligned with the rotatable body 66 of the lower bar 36, and the axis of the rotatable semi-cylindrical body is aligned with each other within the superimposed semi-cylindrical bodies 62, 66. It has through holes 72, 76 having parallel axes. As will be explained more clearly below, the wires 3, 3 'are fed through these holes into the net to be formed.

  The semi-cylindrical bodies 62, 66 have diametral planes 82, 86, usually lying in the plane of symmetry described above. These planes 82, 86 are juxtaposed with the corresponding planes 80, 84 of the corresponding cylinders 60, 64, which are housed in pedestals 48 made in the bars 30, 34.

  Each semi-cylindrical body 60 supported by the bar 30 has an eccentric shaft pivot 78 which projects downward and to which a flat plate 88 is attached, which is preferably disc-shaped and coaxial with the pivot 78. The pivot 78 and the flat plate 88 project upward and are aligned with a corresponding conical element 89 eccentrically mounted on the corresponding cylinder 64. With each set formed by the flat plate 88 and the conical element 89, a cylindrical container 90, 90 'for accommodating a predetermined length of wire 2 wound in a coil 92, 92' can be attached. The wires 2, 2 'emerge upward from the containers 90, 90', through the through holes 70 and into a machine for forming a net together with the wires 3, 3 '. In use, the cylindrical containers 90, 90 'are arranged such that the twisting of the wires 2 and 3 above the semi-cylindrical bodies 60, 62 does not cause an equal and opposite twist underneath. 'Rotate around.

  It should be noted that for every cable 5, two cylindrical containers 92 ', smaller than the other containers 92, are provided. In operation, these two containers are in turn placed in close proximity to the cable 5 and, if left at the standard dimensions, overstress the cable 5. For the same reason, two containers 92 'are also mounted on a small flat plate 88', one of which also has a bevel, during which the reinforcing element 5 has sharp edges while the net is braided. Press to prevent.

  The set of bars 30, 32 and the set of bars 34, 36 are formed by the rack s so that the two superposed bars 32, 36 and the two superposed bars 30, 34 are in a direction parallel to the axis T of the drum. But connected to a position adjustment mechanism that allows it to move simultaneously in opposite directions. The position adjustment mechanism is configured such that each half-cylinder supported by the bar has a second position facing the second half-cylinder adjacent to the first half-cylinder from a first position facing the first half-cylinder of the bar of the pair. It is configured to be able to move to a position. Further, the rotatable semi-cylindrical body is connected to a rotating mechanism that rotates in pairs by a rack such as reference numerals 100 and 102 shown in FIG. Make and make a net.

  In known machines for producing simple double twisted nets without reinforcing elements, all the half cylinders 62, 66 and 60, 64 are identical to one another. However, in the machine according to the invention, several groups of semi-cylinders have small but significant structural differences. In particular, for each cable 5, three sets of modified semi-cylindrical bodies 60a and 62a, 60b and 62b, 60c and 62c housed in upper bars 30, 32 and the same number housed in lower bars 34, 36 Improved semi-cylindrical bodies 64a and 66a, 64b and 66b, 64c and 66c are provided.

  The cable 5 must actually be fed into the machine, but does not have to move laterally while the net is being knitted, since it always maintains a straight course. As a result, the cable 5 is fed into the fixed position corresponding to the common axis of rotation of the two semi-cylindrical bodies 62a, 60a and 66a, 64a in the first operating position of FIG.

  While the semi-cylindrical bodies 62a, 60a and 66a, 64a move to the positions depicted in FIGS. 8 and 9 as described above, the semi-cylindrical bodies 62a, 60a and 66a, 64a have grooves 112, 110 and 116, 114, respectively. The grooves 112, 110, 116, 114 of the semi-cylindrical bodies 62a, 60a, 66a, 64a extend beyond the respective ends 52, 50, 56, 54 of the bars 32, 30, 36, 34 to the grooves 122, 120, Continue to 126,124. The grooves in the semi-cylindrical body and at the end of the bar have the same depth and are slightly larger than the radius of the cable 5, so that the two grooves facing each other accommodate the cable 5 easily without pressing. can do. With respect to the lateral direction, each groove of the semi-cylindrical body is at least equal to the radius of the semi-cylindrical body plus the radius of the cable 5. Each groove created by the combination of the semi-cylindrical groove and the groove at the end of the bar has a width equal to the pitch of at least two pegs 28 plus the diameter of the cable 5.

  By virtue of these grooves, the semi-cylindrical bodies 62a, 60a, 66a, 64a move to the positions depicted in FIGS. 8 and 9, and the cable 5 moves in the grooves facing each other without substantial movement.

  Further, to prevent the cable 5 from excessively rubbing against the cylindrical container 92 ', the semi-cylindrical bodies 62a, 60a, 66a, 64a have an inclined groove shown only in the semi-cylindrical body 60a and designated by reference numeral 61. . By means of the groove 61 (and a similar groove provided in 62a, inclined in the same direction), the cable 5 can be arranged with a slight inclination when the half-cylinder is in the position of FIG. Pressure and rubbing on the cylindrical container 92 'and the flat plate 88' can be reduced. The semi-cylindrical bodies 66a, 64a also have similar inclined grooves that are inclined in the opposite direction to the inclined grooves of the anti-cylindrical bodies 62a, 60a for the same reason.

  Protrusions 600, 602 are provided on each half cylinder 60a, 62a, 64a, 66a to keep the cables from moving when the half cylinders 60a and 62a, 64a and 66a face each other. These protrusions protrude from the upper and lower surfaces of each semi-cylindrical body. Further, the protrusion 600 has the same plane in the grooves 110, 112, 114, and 116. Protrusion 602, on the other hand, protrudes from diametric planes 80, 82, 84, 86 so that semicylindrical bodies 60 a and 62 a, 64 a, and 66 a terminate at protrusion 600 when facing each other. Thus, the cable 5 remains enclosed between the protrusions 602 when the semi-cylindrical bodies 60a and 62a, 64a and 66a face each other. Furthermore, the two semi-cylinders facing each other, with the only exception of the passage of the cable 5, are in contact with each other along the entire diameter by the projections 600, 602 and are always perfectly fitted.

  During manufacture, half cylinder 60a sequentially faces half cylinder 62a at a first position (FIG. 7) and half cylinder 62b at a second position (FIG. 9). Similarly, semi-cylindrical body 62a sequentially faces semi-cylindrical body 60a at a first position (FIG. 7) and semi-cylindrical body 60b at a second position (FIG. 9). The semi-cylindrical bodies 60a, 62a have grooves 604 in the diametric planes 80, 82 that are the same depth as the grooves 110, 112. On the other hand, protrusions 606 of the same depth and height are provided on the diameter planes 80, 82 of the semi-cylindrical bodies 60b, 62b. This protrusion 606 therefore contacts the groove 110 and the groove 604 when the half cylinder is in the second position in FIG. Thus, in the second position, the pairs of semi-cylindrical bodies 60a and 62b, 60b and 62a contact each other along the entire diameter in a stable connection.

  Finally, the semi-cylindrical bodies 60c, 62c have a groove 608 having the same depth and height as the protrusion 606 and having a width equal to the overall width of the semi-cylindrical body. The grooves 608 connect the semi-cylindrical bodies 60b, 62b to the semi-cylindrical bodies 62c, 60c, respectively, at the first position in FIG.

  Of course, in the semi-cylindrical bodies 64a, 64b, 64c and 66a, 66b, 66c, the same projection and groove system corresponding to that described above for the semi-cylindrical bodies 60a, 60b, 60c and 62a, 62b, 62c. Exists.

  Referring to FIGS. 7-9 in more detail, it should be noted that in these figures, the protrusions 600, 602 are not shown as they would interfere with the understanding of the operation shown in the figures.

  In use, the upper bars 30, 32 are first arranged such that the semi-cylindrical bodies 60, 60a, 60b, 60c directly face the semi-cylindrical bodies 62, 62a, 62b, 62c, respectively. The wires 2, 2 'are inserted into the through holes 70, the wires 3, 3' are inserted into the through holes 72, and the cable 5 is received between the grooves 110, 112 of the two semi-cylindrical bodies 60a, 62a.

  At this position, the two rotations of the pair of semi-cylindrical bodies determine the formation of the braid 7, and the rotation of the semi-cylindrical bodies 60a, 62a comprises the braid consisting of the two wires 2 ', 3' and the cable 5. Determine the formation of 7 '. All movements of the upper bars 30, 32 and the half-cylinders located there are also in both this and all manufacturing stages, with the method by the lower bars and the half-cylinders located there. It should be noted that it is performed in the same way.

  When the two twists are completed, the two bars 30, 32 move in the direction of the arrows 130, 131, pass through one in FIG. 8 and reach one in FIG. In this position, half cylinder 60a faces half cylinder 62b, and half cylinder 62a faces half cylinder 60b. In this position, the two rotations of the semi-cylindrical body are in the opposite direction to that taken in the stage of FIG. 7 (in other words, if the twist in FIG. And vice versa), it is preferable to determine the formation of only a twist 7 consisting of only two wires 2 or 2 'and wires 3 or 3'. On the other hand, the cable 5 is accommodated between the two grooves 120, 122 provided in the two bars 30, 32, and is therefore not involved in the twist, but is located between two adjacent braids 7.

  Finally, the two bars 30, 32 move again in the directions of arrows 132, 133 opposite to the directions 130, 131 in the previous movement, respectively. In this way, returning to the position of FIG. 7, the braiding of the net continues.

  In a conventional machine for manufacturing a hexagonal mesh net, the wire 3 is fed into the semi-cylindrical body 66 from a spool or a reel located at the rear of the machine as the movable container 90, 90 'rotates around the wire 3. .

  In the machine according to the invention, a device for feeding the wires 3 ′, generally designated by the reference numeral 200 for the insertion of the cables 5, is provided for each cable 5. The device comprises a reel 202, around which a wire 3 'is wound, which reel is wound around both axes of rotation for unwinding the wire and of a support 204 (fastened directly to the framework of the machine). It can rotate around. As the cable 5 moves through the support 204 so that the reel 202 can rotate about the support 204, the reel 202 can rotate around the cable 5 while the net is braided. Thus, the cable 5 can be fed directly from the spool or otherwise as required without restriction after changing direction through the snub pulley 206.

  Thanks to the transport device 200, it is possible to use a cable having a desired diameter that could not be accommodated on a reel as in the prior art. Similarly, high strength, harder than wires 2 and 3 (usually made of mild steel) could not be accommodated in known reels without the provision of straightening devices that would have given poor results. Reinforcing wires can be used.

In particular, Applicant has wire having a strength greater than about 500 or 600 kg / mm ^2, by using a cable or rope, since it possible to use a well-known machine, the machine forming the subject of the present invention is particularly I found it useful. Nevertheless, the new machine is a lower strength reinforcing wire 1 for producing a known type of reinforced net, of the same strength as the wires 2 and 3 that create the hexagonal mesh. It should be emphasized that they can also be used.

  The reinforcing element 1 preferably has a diameter between 4 and 10 mm, more preferably between 5 and 8 mm. On the other hand, the wires 2, 3, 2 ', 3' have a diameter between 1.8 and 3.9 mm and can be galvanized or coated with plastic. The hexagonal mesh 4 of the net preferably has dimensions of 5 × 7, 6 × 8, 8 × 10, 10 × 12 or 12 × 14 mm.

  For simplicity, the parts of the machine shown and described provide for the use of only one cable 5, but more cables 5 can be inserted into the same net and it is recommended It should be noted that For each cable 5, all the above-mentioned contrivances are provided: a set of cylindrical vessels 90 'of reduced diameter, modified semi-cylindrical bodies 60a, 60b, 60c, 62a, 62b, 62c, 64a, 64b, 64c, 66a. , 66b, and 66c are the same, particularly the transfer device 200.

  The preferred distance between two adjacent cables 5 is between 25 and 100 cm. The overall transverse dimension of the net is preferably between 2 and 5 m.

  The machine described above can also be used to produce a net with a transverse cable 11, as described above with reference to FIG. It is practically sufficient to insert the cable 11 directly above the semi-cylindrical bodies 60, 62 during braiding of the net. To make it more successful, it is desirable to insert the cable 11 in a twisted part 7 ″ different from the twisted part 7 ′ formed by the two wires 2, 3 and the cable 5. Accordingly, the cable 11 is preferably inserted after the first rotation is completed and before the second rotation is completed, when the semi-cylindrical bodies 60, 62 are in the positions depicted in FIG.

  The preferred distance between two adjacent transverse cables 11 is between 25 cm and 100 cm.

Of course, without departing from the principles of the invention, the embodiments and implementation details may vary significantly from those described and described, while maintaining the scope of the invention.

  The present invention relates to a machine and method for manufacturing a reinforced hexagonal net, and a reinforced hexagonal net.

  The present invention relates to, but is not limited to, a machine for manufacturing a hexagonal mesh net with at least one longitudinal (longitudinal) reinforcing element positioned to bisect the mesh that is woven and passed through the entire net. Developed for

  More than 40 years ago (IT1050936), it developed a machine for making hexagonal nets supplying at least one longitudinal reinforcing wire. The machine (FIG. 1) has proven to be very effective, but is used with a reinforcing wire 1 having the same thickness and strength as the wires 27, 34 used to manufacture the entire net. It is designed to be. However, stiffer, higher strength wires or stiffer and thicker cables cannot be used. In this machine, the wire 34 can be wrapped around another wire during weaving, as is common in the art, so that the net is woven with three wires into a braid. It is stored in the cylindrical container 33. A device is provided for the reinforcing wire and the wire 27, by means of which the wire 27 rotates around a reel 85 around which the reinforcing wire 1 is wound. To this end, the dimensions of the reel 85 are compact and the wire 27 is wound around it in a specially designed system. Obviously, a similar solution works perfectly for reinforcing wires 1 of similar stiffness as wires 27, 34, but because they cannot be wound around a reel with a small diameter, cables or high-strength Cannot be used with wires. However, windings of a suitable diameter for cables or high strength wires would not be compatible with this solution.

Applicants have also been patented for two hexagonal mesh nets in which the wires have been replaced by cables. In these nets, each twist consists of only two elements: two wires, or wires and cables. As a result, it does not provide a device that allows the third wire / cable to be spirally wound together. US 433633 describes a machine for producing double twisted nets with the same reinforcing wire as the other wires of the net. GB 113968 describes a hexagonal mesh of reinforcing wires identical to the other wires of the net, wherein the wires are twisted together in both the clockwise and counterclockwise directions in the same torsion area.

  It is an object of the present invention to solve these prior art problems, in particular the manufacture of hexagonal mesh nets having additional longitudinal reinforcing elements, said reinforcing elements being high strength wires or cables or ropes. Is to provide a machine. A further object is to create a part of the machine that is reliable, practical and safe to use.

  To achieve the above objects, the present invention relates to a machine and a net as claimed.

Further features and advantages will become apparent from the following detailed description of preferred embodiments of the invention, which refers to the accompanying drawings, which are provided for purposes of non-limiting examples only.
1 shows a portion of a prior art machine. 1 shows a part of the machine of the invention. 3 shows a net produced by the machine of FIG. 3 shows another net produced by the machine of FIG. FIG. 3 is a detailed view of the upper bar 30 of the machine of FIG. FIG. 3 is a detailed view of the upper bar 32 of the machine of FIG. Shows a pair of upper bars 30, 32 in a first position. Shows a pair of upper bars 30, 32 in a second position. Shows a pair of upper bars 30, 32 in a third position.

  2 to 9, the same elements are denoted by the same reference numerals, and are numbered independently of the prior art FIG.

  The portion of the net 1 in FIG. 3 is a double twisted net composed of a hexagonal mesh and a reinforced cable. The net is spirally wound around each other at the braids 7, 7 'to form a hexagonal mesh 4 and at least one reinforcing cable 5 inserted longitudinally through the selected braid 7'. And a plurality of wires 2, 3, 2 ', 3' wound around the wire. Between the two vertically continuous strands 7 ', the reinforcing cable forms two trapezoidal meshes arranged side by side. Hereinafter, the term "cable" will be used for brevity, but it will be understood that any reinforcing element having a strength greater than the strength of the wire that creates the net can be used. For example, a "cable" can be a metal cable composed of several single strands, a rope with a woven core, or a high-strength metal wire, where appropriate, galvanized or plastic-coated. Or you can.

  The wires and cables that make up the net are all arranged in the same direction, but in the following that direction is indicated as "longitudinal (longitudinal)". Each wire 2,3 is wound in an alternating spiral with a preceding wire 3,2 and a subsequent wire 3,2, known as a double twisted net, to form a twist 7.

  In addition, for every cable 5, the wire 2 ′ is alternately helically wound together with a single preceding wire 3 to form a twist 7, and the wire 2 ′ together with the reinforcing cable 5 It is spirally wound alternately with 3 'to form a twist 7' having three elements.

  Similarly, the wire 3 'is alternately spirally wound with the preceding wire 2' together with the reinforcing cable 5 to form a three-stranded strand 7 ', wherein the wire 3' is a single subsequent wire 2 '. Spirally wound together with the helical member to form a twist 7 having only two elements.

  The twisting continues in the same twisting direction in each of the twists 7, 7 ', i.e. clockwise or counterclockwise but in a constant direction at each twist. In FIG. 3, the twisted parts 7, 7 'have the wires 2, 3 spirally wound in alternating directions from one knitting step to the next, that is, the wires 2, 3 in one step. Once spirally wound together clockwise, the wires 2 and 3 are spirally wound counterclockwise in the lower and upper stages. However, it is not necessary to exclude different shapes, such as all braids 7, 7 'having the same weave direction.

  4, the net 10 further comprises at least one transverse cable 11. The cable 11 is arranged perpendicular to the cable 5 intersecting at the intersection 12 and is inserted into a twist 7 '' formed by two single longitudinal wires 2, 3, 2 ', 3'.

  The part of the net depicted in FIGS. 3 and 4 shows only one longitudinal cable 5 and only one transverse cable 11 so that details can be taken into account because the depicted part is small. It should be noted that Nevertheless, multiple vertical and horizontal cables are typically provided. Nets with these characteristics are extremely resistant to piercing and pulling with sharp objects, with reinforced cables that withstand most stresses directly. On the other hand, in the conventional double twisted net, the wires must withstand stress.

  In order to ensure adequate strength, the distance between the cables 5, 11 in both the horizontal direction (for both embodiments) and the vertical direction (for the embodiment of FIG. 4) should be less than 1 meter. Is preferred. For example, it should be noted that the penetration test rules provide for the use of square punches having a 1 meter surface, and therefore the presence of the cable at a distance of less than 1 meter allows at least one longitudinal cable and ( The transverse cable (if present) will definitely be within the punch.

  The function of the wires in the net in question is to hold the small material, in particular to hold all the cables directly braided in the braid in a fixed position, and the cable 5 , 11 is to hold tightly.

  The machine according to the invention for the manufacture of nets having the features described above is in part similar to the well-known machine for the assembly of conventional double twisted nets, developed many years ago by the same applicant. In the following description of the whole machine, the main focus is on new and original elements which make it possible to produce a net with a reinforced cable 5, and preferably a reinforced cable 11.

  As can be seen in FIG. 2, the machine 20 is, by means (not shown), provided with a drum mounted in a fixed framework of the machine so that it can rotate at a constant speed in the direction of arrow 24 about its axis T. With 22. A radial projection or peg 28 projects outwardly from the curved surface 26 of the drum. These pegs are arranged in rows extending in a direction parallel to the axis T and are arranged at equal angular intervals. The pegs 28 are arranged at regular intervals in each row, and the phases of two consecutive rows are axially shifted by half a pitch.

  These pegs form a hexagonal mesh net and serve to hold the already formed part of the net in the exit direction of the machine.

  Below the drum 22, there is provided a set of bars 30,32 and a set of bars 34,36 supporting a rotatable half cylinder 60,62,64,66, parallel to the axis T, The function of the body is to spirally wind the wires together in pairs to make a net.

  The bar has a U-shaped cross section. They are laid in pairs, with their U-shaped open ends facing each other, located on a vertical object plane bordering the outer edge of the drum 22, the bars 30, 32 forming the upper pair, 34, 36 form a lower pair. Inevitably, the upper and lower sides indicate the positions of the bars arranged in the embodiment in the figures. However, arranging them in different ways, for example running the wires horizontally, is by no means ruled out. More broadly, the "upper" bar has a downstream operating direction relative to the corresponding "lower" bar, regardless of the height at which it is placed.

  The bar is supported by elements 40, 42, 44, 46 which form part of the fixed framework of the machine. They can also move in a direction parallel to the direction of the axis T.

  5 and 6 depict the bars 30, 32 in more detail, which are exactly the same as the lower set of bars, bars 34, 36. Multiple fastenings at each end 50,52,54,56 of all sets of bars 30,32,34,36 facing respective ends 52,50,56,54 of all sets of bars (Pedestal) 48 is formed. The fastening portion 48 has an axis perpendicular to the axis T, is a semi-cylindrical shape located on the above-mentioned symmetry plane, and the distance between each pedestal and the adjacent pedestal in the same bar is Equal to the distance between Each pedestal 48 faces a similar pedestal 48 formed at the end of another bar of the same set.

  Rotatable semi-cylindrical bodies 62, 66 are embedded in pedestals 48 of bars 32, 36, respectively. The rotatable body 62 of the upper bar 32 is aligned with the rotatable body 66 of the lower bar 36, and the axis of the rotatable semi-cylindrical body is aligned with each other within the superimposed semi-cylindrical bodies 62, 66. It has through holes 72, 76 having parallel axes. As will be explained more clearly below, the wires 3, 3 'are fed through these holes into the net to be formed.

  The semi-cylindrical bodies 62, 66 have diametral planes 82, 86, usually lying in the plane of symmetry described above. These planes 82, 86 are juxtaposed with the corresponding planes 80, 84 of the corresponding cylinders 60, 64, which are housed in pedestals 48 made in the bars 30, 34.

  Each semi-cylindrical body 60 supported by the bar 30 has an eccentric shaft pivot 78 which projects downward and to which a flat plate 88 is attached, which is preferably disc-shaped and coaxial with the pivot 78. The pivot 78 and the flat plate 88 project upward and are aligned with a corresponding conical element 89 eccentrically mounted on the corresponding cylinder 64. With each set formed by the flat plate 88 and the conical element 89, a cylindrical container 90, 90 'for accommodating a predetermined length of wire 2 wound in a coil 92, 92' can be attached. The wires 2, 2 'emerge upward from the containers 90, 90', through the through holes 70 and into a machine for forming a net together with the wires 3, 3 '. In use, the cylindrical containers 90, 90 'are arranged such that the twisting of the wires 2 and 3 above the semi-cylindrical bodies 60, 62 does not cause an equal and opposite twist underneath. 'Rotate around.

It should be noted that for each cable 5, two cylindrical containers 92 ', smaller than the other containers 92, are provided. In operation, these two containers are in turn placed in close proximity to the cable 5 and, if left at the standard dimensions, overstress the cable 5. For the same reason, two containers 92 'are also mounted on a small flat plate 88', one of which also has a bevel, during which the reinforcing element 5 has sharp edges while the net is braided. Press to prevent.

  The set of bars 30, 32 and the set of bars 34, 36 are formed by the rack s so that the two superposed bars 32, 36 and the two superposed bars 30, 34 are in a direction parallel to the axis T of the drum. But connected to a position adjustment mechanism that allows it to move simultaneously in opposite directions. The position adjustment mechanism is configured such that each half-cylinder supported by the bar has a second position facing the second half-cylinder adjacent to the first half-cylinder from a first position facing the first half-cylinder of the bar of the pair. It is configured to be able to move to a position. Further, the rotatable semi-cylindrical body is connected to a rotating mechanism that rotates in pairs by a rack such as reference numerals 100 and 102 shown in FIG. Make and make a net.

  In known machines for producing simple double twisted nets without reinforcing elements, all the half cylinders 62, 66 and 60, 64 are identical to one another. However, in the machine according to the invention, several groups of semi-cylinders have small but significant structural differences. In particular, for each cable 5, three sets of modified semi-cylindrical bodies 60a and 62a, 60b and 62b, 60c and 62c housed in upper bars 30, 32 and the same number housed in lower bars 34, 36 Improved semi-cylindrical bodies 64a and 66a, 64b and 66b, 64c and 66c are provided.

  The cable 5 must actually be fed into the machine, but does not have to move laterally while the net is being knitted, since it always maintains a straight course. As a result, the cable 5 is fed into the fixed position corresponding to the common axis of rotation of the two semi-cylindrical bodies 62a, 60a and 66a, 64a in the first operating position of FIG.

  While the semi-cylindrical bodies 62a, 60a and 66a, 64a move to the positions depicted in FIGS. 8 and 9 as described above, the semi-cylindrical bodies 62a, 60a and 66a, 64a have grooves 112, 110 and 116, 114, respectively. The grooves 112, 110, 116, 114 of the semi-cylindrical bodies 62a, 60a, 66a, 64a extend beyond the respective ends 52, 50, 56, 54 of the bars 32, 30, 36, 34 to the grooves 122, 120, Continue to 126,124. The grooves in the semi-cylindrical body and at the end of the bar have the same depth and are slightly larger than the radius of the cable 5, so that the two grooves facing each other accommodate the cable 5 easily without pressing. can do. With respect to the lateral direction, each groove of the semi-cylindrical body is at least equal to the radius of the semi-cylindrical body plus the radius of the cable 5. Each groove created by the combination of the semi-cylindrical groove and the groove at the end of the bar has a width equal to the pitch of at least two pegs 28 plus the diameter of the cable 5.

  By virtue of these grooves, the semi-cylindrical bodies 62a, 60a, 66a, 64a move to the positions depicted in FIGS. 8 and 9, and the cable 5 moves in the grooves facing each other without substantial movement.

  Further, to prevent the cable 5 from excessively rubbing against the cylindrical container 92 ', the semi-cylindrical bodies 62a, 60a, 66a, 64a have an inclined groove shown only in the semi-cylindrical body 60a and designated by reference numeral 61. . By means of the groove 61 (and a similar groove provided in 62a, inclined in the same direction), the cable 5 can be arranged with a slight inclination when the half-cylinder is in the position of FIG. Pressure and rubbing on the cylindrical container 92 'and the flat plate 88' can be reduced. The semi-cylindrical bodies 66a, 64a also have similar inclined grooves that are inclined in the opposite direction to the inclined grooves of the anti-cylindrical bodies 62a, 60a for the same reason.

  Protrusions 600, 602 are provided on each half cylinder 60a, 62a, 64a, 66a to keep the cables from moving when the half cylinders 60a and 62a, 64a and 66a face each other. These protrusions protrude from the upper and lower surfaces of each semi-cylindrical body. Further, the protrusion 600 has the same plane in the grooves 110, 112, 114, and 116. Protrusion 602, on the other hand, protrudes from diametric planes 80, 82, 84, 86 so that semicylindrical bodies 60 a and 62 a, 64 a, and 66 a terminate at protrusion 600 when facing each other. Thus, the cable 5 remains enclosed between the protrusions 602 when the semi-cylindrical bodies 60a and 62a, 64a and 66a face each other. Furthermore, the two semi-cylinders facing each other, with the only exception of the passage of the cable 5, are in contact with each other along the entire diameter by the projections 600, 602 and are always perfectly fitted.

  During manufacture, half cylinder 60a sequentially faces half cylinder 62a at a first position (FIG. 7) and half cylinder 62b at a second position (FIG. 9). Similarly, semi-cylindrical body 62a sequentially faces semi-cylindrical body 60a at a first position (FIG. 7) and semi-cylindrical body 60b at a second position (FIG. 9). The semi-cylindrical bodies 60a, 62a have grooves 604 in the diametric planes 80, 82 that are the same depth as the grooves 110, 112. On the other hand, protrusions 606 of the same depth and height are provided on the diameter planes 80, 82 of the semi-cylindrical bodies 60b, 62b. This protrusion 606 therefore contacts the groove 110 and the groove 604 when the half cylinder is in the second position in FIG. Thus, in the second position, the pairs of semi-cylindrical bodies 60a and 62b, 60b and 62a contact each other along the entire diameter in a stable connection.

  Finally, the semi-cylindrical bodies 60c, 62c have a groove 608 having the same depth and height as the protrusion 606 and having a width equal to the overall width of the semi-cylindrical body. The grooves 608 connect the semi-cylindrical bodies 60b, 62b to the semi-cylindrical bodies 62c, 60c, respectively, at the first position in FIG.

  Of course, in the semi-cylindrical bodies 64a, 64b, 64c and 66a, 66b, 66c, the same projection and groove system corresponding to that described above for the semi-cylindrical bodies 60a, 60b, 60c and 62a, 62b, 62c. Exists.

  Referring to FIGS. 7-9 in more detail, it should be noted that in these figures, the protrusions 600, 602 are not shown as they would interfere with the understanding of the operation shown in the figures.

  In use, the upper bars 30, 32 are first arranged such that the semi-cylindrical bodies 60, 60a, 60b, 60c directly face the semi-cylindrical bodies 62, 62a, 62b, 62c, respectively. The wires 2, 2 'are inserted into the through holes 70, the wires 3, 3' are inserted into the through holes 72, and the cable 5 is received between the grooves 110, 112 of the two semi-cylindrical bodies 60a, 62a.

  At this position, the two rotations of the pair of semi-cylindrical bodies determine the formation of the braid 7, and the rotation of the semi-cylindrical bodies 60a, 62a comprises the braid consisting of the two wires 2 ', 3' and the cable 5. Determine the formation of 7 '. All movements of the upper bars 30, 32 and the half-cylinders located there are also in both this and all manufacturing stages, with the method by the lower bars and the half-cylinders located there. It should be noted that it is performed in the same way.

  When the two twists are completed, the two bars 30, 32 move in the direction of the arrows 130, 131, pass through one in FIG. 8 and reach one in FIG. In this position, half cylinder 60a faces half cylinder 62b, and half cylinder 62a faces half cylinder 60b. In this position, the two rotations of the semi-cylindrical body are in the opposite direction to that taken in the stage of FIG. 7 (in other words, if the twist in FIG. And vice versa), it is preferable to determine the formation of only a twist 7 consisting of only two wires 2 or 2 'and wires 3 or 3'. On the other hand, the cable 5 is accommodated between the two grooves 120, 122 provided in the two bars 30, 32, and is therefore not involved in the twist, but is located between two adjacent braids 7.

  Finally, the two bars 30, 32 move again in the directions of arrows 132, 133 opposite to the directions 130, 131 in the previous movement, respectively. In this way, returning to the position of FIG. 7, the braiding of the net continues.

  In a conventional machine for manufacturing a hexagonal mesh net, the wire 3 is fed into the semi-cylindrical body 66 from a spool or a reel located at the rear of the machine as the movable container 90, 90 'rotates around the wire 3. .

  In the machine according to the invention, a device for feeding the wires 3 ′, generally designated by the reference numeral 200 for the insertion of the cables 5, is provided for each cable 5. The device comprises a reel 202, around which a wire 3 'is wound, which reel is wound around both axes of rotation for unwinding the wire and of a support 204 (fastened directly to the framework of the machine). It can rotate around. As the cable 5 moves through the support 204 so that the reel 202 can rotate about the support 204, the reel 202 can rotate around the cable 5 while the net is braided. Thus, the cable 5 can be fed directly from the spool or otherwise as required without restriction after changing direction through the snub pulley 206.

  Thanks to the transport device 200, it is possible to use a cable having a desired diameter that could not be accommodated on a reel as in the prior art. Similarly, high strength, harder than wires 2 and 3 (usually made of mild steel) could not be accommodated in known reels without the provision of straightening devices that would have given poor results. Reinforcing wires can be used.

In particular, Applicant has wire having a strength greater than about 500 or 600 kg / mm ^2, by using a cable or rope, since it possible to use a well-known machine, the machine forming the subject of the present invention is particularly I found it useful. Nevertheless, the new machine is a lower strength reinforcing wire 1 for producing a known type of reinforced net, of the same strength as the wires 2 and 3 that create the hexagonal mesh. It should be emphasized that they can also be used.

  The reinforcing element 1 preferably has a diameter between 4 and 10 mm, more preferably between 5 and 8 mm. On the other hand, the wires 2, 3, 2 ', 3' have a diameter between 1.8 and 3.9 mm and can be galvanized or coated with plastic. The hexagonal mesh 4 of the net preferably has dimensions of 5 × 7, 6 × 8, 8 × 10, 10 × 12 or 12 × 14 mm.

  For simplicity, the parts of the machine shown and described provide for the use of only one cable 5, but more cables 5 can be inserted into the same net and it is recommended It should be noted that For each cable 5, all the above-mentioned contrivances are provided: a set of cylindrical vessels 90 'of reduced diameter, modified semi-cylindrical bodies 60a, 60b, 60c, 62a, 62b, 62c, 64a, 64b, 64c, 66a. , 66b, and 66c are the same, particularly the transfer device 200.

  The preferred distance between two adjacent cables 5 is between 25 and 100 cm. The overall transverse dimension of the net is preferably between 2 and 5 m.

  The machine described above can also be used to produce a net with a transverse cable 11, as described above with reference to FIG. It is practically sufficient to insert the cable 11 directly above the semi-cylindrical bodies 60, 62 during braiding of the net. To make it more successful, it is desirable to insert the cable 11 in a twisted part 7 ″ different from the twisted part 7 ′ formed by the two wires 2, 3 and the cable 5. Accordingly, the cable 11 is preferably inserted after the first rotation is completed and before the second rotation is completed, when the semi-cylindrical bodies 60, 62 are in the positions depicted in FIG.

  The preferred distance between two adjacent transverse cables 11 is between 25 cm and 100 cm.

  Of course, without departing from the principles of the invention, the embodiments and implementation details may vary significantly from those described and described, while maintaining the scope of the invention.

  The present invention relates to a machine and method for manufacturing a reinforced hexagonal net, and a reinforced hexagonal net.

  The present invention relates to, but is not limited to, a machine for manufacturing a hexagonal mesh net with at least one longitudinal (longitudinal) reinforcing element positioned to bisect the mesh that is woven and passed through the entire net. Developed for

More than 40 years ago (IT1050936), the Applicant has developed a machine for making hexagonal nets supplying at least one longitudinal reinforcing wire. The machine (FIG. 1) has proven to be very effective, but is used with a reinforcing wire 1 having the same thickness and strength as the wires 27, 34 used to manufacture the entire net. It is designed to be. However, stiffer, higher strength wires or stiffer and thicker cables cannot be used. In this machine, the wire 34 can be wrapped around another wire during weaving, as is common in the art, so that the net is woven with three wires into a braid. It is stored in the cylindrical container 33. A device is provided for the reinforcing wire and the wire 27, by means of which the wire 27 rotates around a reel 85 around which the reinforcing wire 1 is wound. To this end, the dimensions of the reel 85 are compact and the wire 27 is wound around it in a specially designed system. Obviously, a similar solution works perfectly for reinforcing wires 1 of similar stiffness as wires 27, 34, but because they cannot be wound around a reel with a small diameter, cables or high strength Cannot be used with wires. However, windings of a suitable diameter for cables or high strength wires would not be compatible with this solution.

  Applicants have also been patented for two hexagonal mesh nets in which the wires have been replaced by cables. In these nets, each twist consists of only two elements: two wires, or wires and cables. As a result, it does not provide a device that allows the third wire / cable to be spirally wound together. US 433633 describes a machine for producing double twisted nets with the same reinforcing wires as the other wires of the net. GB 113968 describes a hexagonal mesh of reinforcing wires identical to the other wires of the net, wherein the wires are twisted together in both the clockwise and counterclockwise directions in the same torsion area.

  It is an object of the present invention to solve these prior art problems, in particular the manufacture of hexagonal mesh nets having additional longitudinal reinforcing elements, said reinforcing elements being high strength wires or cables or ropes. Is to provide a machine. A further object is to create a part of the machine that is reliable, practical and safe to use.

  To achieve the above objects, the present invention relates to a machine and a net as claimed.

Further features and advantages will become apparent from the following detailed description of preferred embodiments of the invention, which refers to the accompanying drawings, which are provided for purposes of non-limiting examples only.
1 shows a portion of a prior art machine. 1 shows a part of the machine of the invention. 3 shows a net produced by the machine of FIG. 3 shows another net produced by the machine of FIG. FIG. 3 is a detailed view of the upper bar 30 of the machine of FIG. FIG. 3 is a detailed view of the upper bar 32 of the machine of FIG. Shows a pair of upper bars 30, 32 in a first position. Shows a pair of upper bars 30, 32 in a second position. Shows a pair of upper bars 30, 32 in a third position.

  2 to 9, the same elements are denoted by the same reference numerals, and are numbered independently of the prior art FIG.

  The portion of the net 1 in FIG. 3 is a double twisted net composed of a hexagonal mesh and a reinforced cable. The net is spirally wound around each other at the braids 7, 7 'to form a hexagonal mesh 4 and at least one reinforcing cable 5 inserted longitudinally through the selected braid 7'. And a plurality of wires 2, 3, 2 ', 3' wound around the wire. Between the two vertically continuous strands 7 ', the reinforcing cable forms two trapezoidal meshes arranged side by side. Hereinafter, the term "cable" will be used for brevity, but it will be understood that any reinforcing element having a strength greater than the strength of the wire that creates the net can be used. For example, a "cable" can be a metal cable composed of several single strands, a rope with a woven core, or a high-strength metal wire, where appropriate, galvanized or plastic-coated. Or you can.

  The wires and cables that make up the net are all arranged in the same direction, but in the following that direction is indicated as "longitudinal (longitudinal)". Each wire 2,3 is wound in an alternating spiral with a preceding wire 3,2 and a subsequent wire 3,2, known as a double twisted net, to form a twist 7.

  In addition, for every cable 5, the wire 2 ′ is alternately helically wound together with a single preceding wire 3 to form a twist 7, and the wire 2 ′ together with the reinforcing cable 5 It is spirally wound alternately with 3 'to form a twist 7' having three elements.

  Similarly, the wire 3 'is alternately spirally wound with the preceding wire 2' together with the reinforcing cable 5 to form a three-stranded strand 7 ', wherein the wire 3' is a single subsequent wire 2 '. Spirally wound together with the helical member to form a twist 7 having only two elements.

  The twisting continues in the same twisting direction in each of the twists 7, 7 ', i.e. clockwise or counterclockwise but in a constant direction at each twist. In FIG. 3, the twisted parts 7, 7 'have the wires 2, 3 spirally wound in alternating directions from one knitting step to the next, that is, the wires 2, 3 in one step. Once spirally wound together clockwise, the wires 2 and 3 are spirally wound counterclockwise in the lower and upper stages. However, it is not necessary to exclude different shapes, such as all braids 7, 7 'having the same weave direction.

4, the net 10 further comprises at least one transverse cable 11. Cable 11 is disposed perpendicular to the cable 5 intersect at an intersection 12, longitudinal wires of the two alone 2,3,2 ', 3' are inserted into the twisted part 7 '' formed by .

  The part of the net depicted in FIGS. 3 and 4 shows only one longitudinal cable 5 and only one transverse cable 11 so that details can be taken into account because the depicted part is small. It should be noted that Nevertheless, multiple vertical and horizontal cables are typically provided. Nets with these characteristics are extremely resistant to piercing and pulling with sharp objects, with reinforced cables that withstand most stresses directly. On the other hand, in the conventional double twisted net, the wires must withstand stress.

  In order to ensure adequate strength, the distance between the cables 5, 11 in both the horizontal direction (for both embodiments) and the vertical direction (for the embodiment of FIG. 4) should be less than 1 meter. Is preferred. For example, it should be noted that the penetration test rules provide for the use of square punches having a 1 meter surface, and therefore the presence of the cable at a distance of less than 1 meter allows at least one longitudinal cable and ( The transverse cable (if present) will definitely be within the punch.

  The function of the wires in the net in question is to hold the small material, in particular to hold all the cables directly braided in the braid in a fixed position, and the cable 5 , 11 is to hold tightly.

  The machine according to the invention for the manufacture of nets having the features described above is in part similar to the well-known machine for the assembly of conventional double twisted nets, developed many years ago by the same applicant. In the following description of the whole machine, the main focus is on new and original elements which make it possible to produce a net with a reinforced cable 5, and preferably a reinforced cable 11.

  As can be seen in FIG. 2, the machine 20 is, by means (not shown), provided with a drum mounted in a fixed framework of the machine so that it can rotate at a constant speed in the direction of arrow 24 about its axis T. With 22. A radial projection or peg 28 projects outwardly from the curved surface 26 of the drum. These pegs are arranged in rows extending in a direction parallel to the axis T and are arranged at equal angular intervals. The pegs 28 are arranged at regular intervals in each row, and the phases of two consecutive rows are axially shifted by half a pitch.

  These pegs form a hexagonal mesh net and serve to hold the already formed part of the net in the exit direction of the machine.

  Below the drum 22, there is provided a set of bars 30,32 and a set of bars 34,36 supporting a rotatable half cylinder 60,62,64,66, parallel to the axis T, The function of the body is to spirally wind the wires together in pairs to make a net.

  The bar has a U-shaped cross section. They are laid in pairs, with their U-shaped open ends facing each other, located on a vertical object plane bordering the outer edge of the drum 22, the bars 30, 32 forming the upper pair, 34, 36 form a lower pair. Inevitably, the upper and lower sides indicate the positions of the bars arranged in the embodiment in the figures. However, arranging them in different ways, for example running the wires horizontally, is by no means ruled out. More broadly, the "upper" bar has a downstream operating direction relative to the corresponding "lower" bar, regardless of the height at which it is placed.

  The bar is supported by elements 40, 42, 44, 46 which form part of the fixed framework of the machine. They can also move in a direction parallel to the direction of the axis T.

  5 and 6 depict the bars 30, 32 in more detail, which are exactly the same as the lower set of bars, bars 34, 36. Multiple fastenings at each end 50,52,54,56 of all sets of bars 30,32,34,36 facing respective ends 52,50,56,54 of all sets of bars (Pedestal) 48 is formed. The fastening portion 48 has an axis perpendicular to the axis T, is a semi-cylindrical shape located on the above-mentioned symmetry plane, and the distance between each pedestal and the adjacent pedestal in the same bar is Equal to the distance between Each pedestal 48 faces a similar pedestal 48 formed at the end of another bar of the same set.

  Rotatable semi-cylindrical bodies 62, 66 are embedded in pedestals 48 of bars 32, 36, respectively. The rotatable body 62 of the upper bar 32 is aligned with the rotatable body 66 of the lower bar 36, and the axis of the rotatable semi-cylindrical body is aligned with each other within the superimposed semi-cylindrical bodies 62, 66. It has through holes 72, 76 having parallel axes. As will be explained more clearly below, the wires 3, 3 'are fed through these holes into the net to be formed.

  The semi-cylindrical bodies 62, 66 have diametral planes 82, 86, usually lying in the plane of symmetry described above. These planes 82, 86 are juxtaposed with the corresponding planes 80, 84 of the corresponding cylinders 60, 64, which are housed in pedestals 48 made in the bars 30, 34.

  Each semi-cylindrical body 60 supported by the bar 30 has an eccentric shaft pivot 78 which projects downward and to which a flat plate 88 is attached, which is preferably disc-shaped and coaxial with the pivot 78. The pivot 78 and the flat plate 88 project upward and are aligned with a corresponding conical element 89 eccentrically mounted on the corresponding cylinder 64. With each set formed by the flat plate 88 and the conical element 89, a cylindrical container 90, 90 'for accommodating a predetermined length of wire 2 wound in a coil 92, 92' can be attached. The wires 2, 2 'emerge upward from the containers 90, 90', through the through holes 70 and into a machine for forming a net together with the wires 3, 3 '. In use, the cylindrical containers 90, 90 'are arranged such that the twisting of the wires 2 and 3 above the semi-cylindrical bodies 60, 62 does not cause an equal and opposite twist underneath. 'Rotate around.

For each cable 5, it should be noted that two of the cylindrical container 90 'is provided thinner than the other containers 90. In operation, these two containers are in turn placed in close proximity to the cable 5 and, if left at the standard dimensions, overstress the cable 5. For the same reason, two containers 90 ' are also mounted on a small flat plate 88', one of these flat plates also having a bevel, while the reinforcing element 5 has sharp edges while the net is braided. Press to prevent.

  The set of bars 30, 32 and the set of bars 34, 36 are formed by the rack s so that the two superposed bars 32, 36 and the two superposed bars 30, 34 are in a direction parallel to the axis T of the drum. But connected to a position adjustment mechanism that allows it to move simultaneously in opposite directions. The position adjustment mechanism is configured such that each half-cylinder supported by the bar has a second position facing the second half-cylinder adjacent to the first half-cylinder from a first position facing the first half-cylinder of the bar of the pair. It is configured to be able to move to a position. Further, the rotatable semi-cylindrical body is connected to a rotating mechanism that rotates in pairs by a rack such as reference numerals 100 and 102 shown in FIG. Make and make a net.

  In known machines for producing simple double twisted nets without reinforcing elements, all the half cylinders 62, 66 and 60, 64 are identical to one another. However, in the machine according to the invention, several groups of semi-cylinders have small but significant structural differences. In particular, for each cable 5, three sets of modified semi-cylindrical bodies 60a and 62a, 60b and 62b, 60c and 62c housed in upper bars 30, 32 and the same number housed in lower bars 34, 36 Improved semi-cylindrical bodies 64a and 66a, 64b and 66b, 64c and 66c are provided.

  The cable 5 must actually be fed into the machine, but does not have to move laterally while the net is being knitted, since it always maintains a straight course. As a result, the cable 5 is fed into the fixed position corresponding to the common axis of rotation of the two semi-cylindrical bodies 62a, 60a and 66a, 64a in the first operating position of FIG.

  In order to keep the cable 5 stationary while the semi-cylindrical bodies 62a, 60a and 66a, 64a move to the position depicted in FIGS. 8 and 9 as described above, the semi-cylindrical bodies 62a, 60a and 66a, 64a have grooves 112, 110 and 116, 114, respectively. The grooves 112, 110, 116, 114 of the semi-cylindrical bodies 62a, 60a, 66a, 64a extend beyond the respective ends 52, 50, 56, 54 of the bars 32, 30, 36, 34 to the grooves 122, 120, Continue to 126,124. The grooves in the semi-cylindrical body and in the end of the bar have the same depth and are slightly larger than the radius of the cable 5, so that the two grooves facing each other easily accommodate the cable 5 without pressing. can do. With respect to the lateral direction, each groove of the semi-cylindrical body is at least equal to the radius of the semi-cylindrical body plus the radius of the cable 5. Each groove created by the combination of the semi-cylindrical groove and the groove at the end of the bar has a width equal to the pitch of at least two pegs 28 plus the diameter of the cable 5.

  By virtue of these grooves, the semi-cylindrical bodies 62a, 60a, 66a, 64a move to the positions depicted in FIGS. 8 and 9, and the cable 5 moves in the grooves facing each other without substantial movement.

Furthermore, in order to prevent the cable 5 from excessively rubbing against the cylindrical container 90 ' , the semi-cylindrical bodies 62a, 60a, 66a, 64a have inclined grooves which are only shown in the semi-cylindrical body 60a and which are indicated by the reference numeral 61. . By means of the groove 61 (and a similar groove provided in 62a, inclined in the same direction), the cable 5 can be arranged with a slight inclination when the half-cylinder is in the position of FIG. Pressure and rubbing on the cylindrical container 90 ' and the flat plate 88' can be reduced. The semi-cylindrical bodies 66a, 64a also have similar inclined grooves that are inclined in the opposite direction to the inclined grooves of the anti-cylindrical bodies 62a, 60a for the same reason.

  Protrusions 600, 602 are provided on each half cylinder 60a, 62a, 64a, 66a to keep the cables from moving when the half cylinders 60a and 62a, 64a and 66a face each other. These protrusions protrude from the upper and lower surfaces of each semi-cylindrical body. Further, the protrusion 600 has the same plane in the grooves 110, 112, 114, and 116. Protrusion 602, on the other hand, protrudes from diametric planes 80, 82, 84, 86 so that semicylindrical bodies 60 a and 62 a, 64 a, and 66 a terminate at protrusion 600 when facing each other. Thus, the cable 5 remains enclosed between the protrusions 602 when the semi-cylindrical bodies 60a and 62a, 64a and 66a face each other. Furthermore, the two semi-cylinders facing each other, with the only exception of the passage of the cable 5, are in contact with each other along the entire diameter by the projections 600, 602 and are always perfectly fitted.

  During manufacture, half cylinder 60a sequentially faces half cylinder 62a at a first position (FIG. 7) and half cylinder 62b at a second position (FIG. 9). Similarly, semi-cylindrical body 62a sequentially faces semi-cylindrical body 60a at a first position (FIG. 7) and semi-cylindrical body 60b at a second position (FIG. 9). The semi-cylindrical bodies 60a, 62a have grooves 604 in the diametric planes 80, 82 that are the same depth as the grooves 110, 112. On the other hand, protrusions 606 of the same depth and height are provided on the diameter planes 80, 82 of the semi-cylindrical bodies 60b, 62b. This protrusion 606 therefore contacts the groove 110 and the groove 604 when the half cylinder is in the second position in FIG. Thus, in the second position, the pairs of semi-cylindrical bodies 60a and 62b, 60b and 62a contact each other along the entire diameter in a stable connection.

  Finally, the semi-cylindrical bodies 60c, 62c have a groove 608 having the same depth and height as the protrusion 606 and having a width equal to the overall width of the semi-cylindrical body. The grooves 608 connect the semi-cylindrical bodies 60b, 62b to the semi-cylindrical bodies 62c, 60c, respectively, at the first position in FIG.

  Of course, in the semi-cylindrical bodies 64a, 64b, 64c and 66a, 66b, 66c, the same projection and groove system corresponding to that described above for the semi-cylindrical bodies 60a, 60b, 60c and 62a, 62b, 62c. Exists.

  Referring to FIGS. 7-9 in more detail, it should be noted that in these figures, the protrusions 600, 602 are not shown as they would interfere with the understanding of the operation shown in the figures.

  In use, the upper bars 30, 32 are first arranged such that the semi-cylindrical bodies 60, 60a, 60b, 60c directly face the semi-cylindrical bodies 62, 62a, 62b, 62c, respectively. The wires 2, 2 'are inserted into the through holes 70, the wires 3, 3' are inserted into the through holes 72, and the cable 5 is received between the grooves 110, 112 of the two semi-cylindrical bodies 60a, 62a.

  At this position, the two rotations of the pair of semi-cylindrical bodies determine the formation of the braid 7, and the rotation of the semi-cylindrical bodies 60a, 62a comprises the braid consisting of the two wires 2 ', 3' and the cable 5. Determine the formation of 7 '. All movements of the upper bars 30, 32 and the half-cylinders located there are also in both this and all manufacturing stages, with the method by the lower bars and the half-cylinders located there. It should be noted that it is performed in the same way.

  When the two twists are completed, the two bars 30, 32 move in the direction of the arrows 130, 131, pass through one in FIG. 8 and reach one in FIG. In this position, half cylinder 60a faces half cylinder 62b, and half cylinder 62a faces half cylinder 60b. In this position, the two rotations of the semi-cylindrical body are in the opposite direction to that taken in the stage of FIG. 7 (in other words, if the twist in FIG. And vice versa), it is preferable to determine the formation of only a twist 7 consisting of only two wires 2 or 2 'and wires 3 or 3'. On the other hand, the cable 5 is accommodated between the two grooves 120, 122 provided in the two bars 30, 32, and is therefore not involved in the twist, but is located between two adjacent braids 7.

  Finally, the two bars 30, 32 move again in the directions of arrows 132, 133 opposite to the directions 130, 131 in the previous movement, respectively. In this way, returning to the position of FIG. 7, the braiding of the net continues.

  In a conventional machine for manufacturing a hexagonal mesh net, the wire 3 is fed into the semi-cylindrical body 66 from a spool or a reel located at the rear of the machine as the movable container 90, 90 'rotates around the wire 3. .

  In the machine according to the invention, a device for feeding the wires 3 ′, generally designated by the reference numeral 200 for the insertion of the cables 5, is provided for each cable 5. The device comprises a reel 202, around which a wire 3 'is wound, which reel is wound around both axes of rotation for unwinding the wire and of a support 204 (fastened directly to the framework of the machine). It can rotate around. As the cable 5 moves through the support 204 so that the reel 202 can rotate about the support 204, the reel 202 can rotate around the cable 5 while the net is braided. Thus, the cable 5 can be fed directly from the spool or otherwise as required without restriction after changing direction through the snub pulley 206.

  Thanks to the transport device 200, it is possible to use a cable having a desired diameter that could not be accommodated on a reel as in the prior art. Similarly, high strength, harder than wires 2 and 3 (usually made of mild steel) could not be accommodated in known reels without the provision of straightening devices that would have given poor results. Reinforcing wires can be used.

In particular, Applicant has wire having a strength greater than about 500 or 600 kg / mm ^2, by using a cable or rope, since it possible to use a well-known machine, the machine forming the subject of the present invention is particularly I found it useful. Nevertheless, the new machine is a lower strength reinforcing wire 1 for producing a known type of reinforced net, of the same strength as the wires 2 and 3 that create the hexagonal mesh. It should be emphasized that they can also be used.

  The reinforcing element 1 preferably has a diameter between 4 and 10 mm, more preferably between 5 and 8 mm. On the other hand, the wires 2, 3, 2 ', 3' have a diameter between 1.8 and 3.9 mm and can be galvanized or coated with plastic. The hexagonal mesh 4 of the net preferably has dimensions of 5 × 7, 6 × 8, 8 × 10, 10 × 12 or 12 × 14 mm.

  For simplicity, the parts of the machine shown and described provide for the use of only one cable 5, but more cables 5 can be inserted into the same net and it is recommended It should be noted that For each cable 5, all the above-mentioned contrivances are provided: a set of cylindrical vessels 90 'of reduced diameter, modified semi-cylindrical bodies 60a, 60b, 60c, 62a, 62b, 62c, 64a, 64b, 64c, 66a. , 66b, and 66c are the same, particularly the transfer device 200.

  The preferred distance between two adjacent cables 5 is between 25 and 100 cm. The overall transverse dimension of the net is preferably between 2 and 5 m.

  The machine described above can also be used to produce a net with a transverse cable 11, as described above with reference to FIG. It is practically sufficient to insert the cable 11 directly above the semi-cylindrical bodies 60, 62 during braiding of the net. To make it more successful, it is desirable to insert the cable 11 in a twisted part 7 ″ different from the twisted part 7 ′ formed by the two wires 2, 3 and the cable 5. Accordingly, the cable 11 is preferably inserted after the first rotation is completed and before the second rotation is completed, when the semi-cylindrical bodies 60, 62 are in the positions depicted in FIG.

  The preferred distance between two adjacent transverse cables 11 is between 25 cm and 100 cm.

  Of course, without departing from the principles of the invention, the embodiments and implementation details may vary significantly from those described and described, while maintaining the scope of the invention.

Claims (11)

A machine for manufacturing a reinforcing net (1, 10) having a hexagonal mesh consisting of a plurality of permanently deformable wires (2, 2 ', 3, 3') and at least one reinforcing element (5). A machine for spirally winding two first wires (2, 2 ') and two second wires (3, 3') one after the other, said passage for said reinforcing element (5). The mechanism with
The first wire (2, 2 ') mounted on the machine and fed from a plurality of containers (90, 90') having a predetermined length of the first wire (2, 2 ') therein; ),
A part of said second wire (3) fed alternately with said first wire for weaving two by two in said spiral winding mechanism; and
The reinforcing element (5) fed into the machine;
And a transport system for
A machine wherein for every said reinforcing element (5) a wire container (202) for one of said second wires (3 ') is provided, said wire container being rotatable around said reinforcing element.   The machine according to claim 1, wherein the wire container (202) is a reel.   2. The container according to claim 1, wherein two of said containers for feeding said first wire are thinner than other containers for all said reinforcing elements. 3. The machine according to any one of 2. The mutually spirally winding mechanism,
A set of upper supports (30, 32) for a rotatable half-cylinder (60, 62, 60a, 62a), wherein said rotatable half-cylinder is a first wire or a second wire, respectively; With through holes (70,72) through which the wires (2,3,2 ', 3') pass, they can be joined two by two so that the twisted part (7,7 ') of the net can be formed It is rotatable in pairs and receives said reinforcing element (5) while the wires (2,2 ', 3,3') are wound together or spirally around said reinforcing element A set of upper supports, wherein at least one set (60a, 62a) of said rotatable half-cylinder further comprises a groove (110, 112);
A set of lower supports (34, 36) for the rotatable half-cylinders (64, 66, 64a, 66a), wherein said set of lower supports and half-cylinders is At least one of the rotatable half-cylinders, which can directly correspond and move synchronously with the set of upper supports and the associated half-cylinders, for receiving the reinforcing element (5); One set (64a, 66a) further comprising a groove (114, 116);
A plurality of wires (3, 3 ') are provided with the semi-cylindrical bodies (66, 66a) of one support (36) of the set of lower supports and corresponding indications of the set of upper supports. A machine according to any of the preceding claims, wherein the machine is slidable between a corresponding half cylinder (62, 62a) of a part (32).   The support (30, 32, 34, 36) for the semi-cylindrical body (60, 62, 64, 66, 60a, 62a, 64a, 66a) has a U-shaped cross section, A bar which is placed in pairs with each open end (50, 52, 54, 56) facing each other, located on a plane of vertical symmetry, movable in their longitudinal direction, The end (50) of each bar (30, 32, 34, 36) of each set facing the respective end (50, 52, 54, 56) of the pair of bars (48). , 52, 54, 56), each of said fasteners facing a similar pedestal (48) made at the end of another bar of the same set of said semi-cylindrical bodies, Each of the grooves (112, 110, 116, 114) of 62a, 60a, 66a, 64a respectively correspond to the end (52, 50, 56, 54) of each of the bars (32, 30, 36, 34). Over and following another groove (122, 120, 126, 124), the groove (112, 110, 116) of the semi-cylindrical body. 114) and the groove (122, 120, 126, 124) at the end of the bar has a depth slightly greater than the radius of the reinforcing element (5) and the width of the mesh of the net Machine according to claim 4, having a total width equal to the sum of the diameters of the reinforcing elements (5).   A multi-twisted net (1,10) having a hexagonal mesh consisting of a plurality of wires (2,3,2 ', 3') and at least one reinforcing element (5), said wires comprising two wires; Two each as a first twist (7,7 ″) spirally wound together and as a second twist (7 ′) spirally wound around the reinforcing element together with the wire A net spirally wound together, wherein the reinforcing element has a strength greater than the strength of the wire.   The net according to claim 6, wherein the reinforcing element is a cable, a rope or a high-strength steel wire.   The method according to claim 7, wherein the reinforcing element (5) is a metal cable composed of several single strands, the overall diameter being at least twice as large as the permanently deformable wire creating the rest of the net. Net. Net according to claim 6 is a high strength wire which the reinforcing element has at least about strength of 500 kg / mm ^2.   9. The device according to claim 6, further comprising at least one lateral reinforcing element (11) arranged perpendicular to the direction of the reinforcing element and inserted into the first twist (7 ''). Net described. A method of manufacturing a net according to any one of claims 6 to 10, wherein the method comprises:
Supplying a plurality of wires (2, 2 ', 3, 3');
Providing at least one reinforcing element (5) having a strength greater than the strength of the wire;
A first twist (7, 7 ″) in which only two wires are spirally wound together with an adjacent wire (2, 2 ′, 3, 3 ′), and the two wires are reinforced together Spirally winding a second twisted portion (7 ') spirally wound around the element;
A method that includes

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